<template>
    <div>
        <!-- 面包屑导航区 -->
        <el-breadcrumb separator-class="el-icon-arrow-right">
            <el-breadcrumb-item :to="{ path: '/home' }">首页</el-breadcrumb-item>
            <el-breadcrumb-item>商品管理</el-breadcrumb-item>
            <el-breadcrumb-item>参数列表</el-breadcrumb-item>
        </el-breadcrumb>

        <!-- 卡片视图 -->
        <el-card>
            <!-- 头部警告区 -->
            <el-alert title="注意：只允许为第三级分类设置相关参数" 
            type="warning" closable  show-icon>
            </el-alert>
             <el-row class="cat_opt">
                <el-col>
                   <span>选择商品分类：</span>
                   <!-- 选择商品分类级联选择框 -->
                   <el-cascader
                     expand-trigger="hover"
                     v-model="selectcatekeys"
                     :options="cateList"
                     :props="cateProps"
                     @change="handleChange"></el-cascader>
                </el-col>
            </el-row>
            <!-- tab页签区域 -->
            <el-tabs v-model="activeName" @tab-click="handleTabClick">
              <!-- 添加动态参数 -->
              <el-tab-pane label="动态参数" name="many">
                  <el-button type="primary" size="mini"
                  :disabled="isBtnDisabled" @click="addDialogVisible = true"> 添加参数</el-button>
                  <!-- 动态参数表格 -->
                  <el-table :data="manyTableData" border stripe>
                      <!-- 展开行 -->
                      <el-table-column type="expand">
                          <template slot-scope="scope"> 
                              <el-tag v-for="(item,i) in scope.row.attr_vals"
                               :key="i" closable @close="handleClose(i,scope.row)">
                                  {{item}}
                              </el-tag>
                              <!-- 添加的文本框 -->
                              <el-input
                                class="input-new-tag"
                                v-if="scope.row.inputVisible"
                                v-model="scope.row.inputValue"
                                ref="saveTagInput"
                                size="small"
                                @keyup.enter.native="handleInputConfirm(scope.row)"
                                @blur="handleInputConfirm(scope.row)"
                              >
                              </el-input>
                              <el-button v-else class="button-new-tag" size="small" @click="showInput(scope.row)">+ New Tag</el-button>
                          </template>
                      </el-table-column>
                      <!-- 索引列 -->
                      <el-table-column type="index"></el-table-column>
                      <el-table-column label="参数名称" prop="attr_name"></el-table-column>
                      <el-table-column label="操作">
                          <template slot-scope="scope">
                              <el-button type="primary" size="mini" icon="el-icon-edit" @click="showEditDialog(scope.row.attr_id)">编辑</el-button>
                              <el-button type="danger" size="mini" icon="el-icon-dalete" @click="removeParams(scope.row.attr_id)">删除</el-button>
                          </template>
                      </el-table-column>

                  </el-table>
              </el-tab-pane>
               <!-- 添加静态属性 -->
              <el-tab-pane label="静态属性" name="only">
                  <el-button type="primary" size="mini"
                  :disabled="isBtnDisabled" @click="addDialogVisible = true"> 添加属性</el-button>
                  <!-- 静态属性参数表格 -->
                  <el-table :data="onlyTableData" border stripe>
                      <!-- 展开行 -->
                      <el-table-column type="expand">
                                                <el-table-column type="expand">
                          <template slot-scope="scope"> 
                              <el-tag v-for="(item,i) in scope.row.attr_vals"
                               :key="i" closable @close="handleClose(i,scope.row)">
                                  {{item}}
                              </el-tag>
                              <!-- 添加的文本框 -->
                              <el-input
                                class="input-new-tag"
                                v-if="scope.row.inputVisible"
                                v-model="scope.row.inputValue"
                                ref="saveTagInput"
                                size="small"
                                @keyup.enter.native="handleInputConfirm(scope.row)"
                                @blur="handleInputConfirm(scope.row)"
                              >
                              </el-input>
                              <el-button v-else class="button-new-tag" size="small" @click="showInput(scope.row)">+ New Tag</el-button>
                          </template>
                      </el-table-column>
                      </el-table-column>
                      <!-- 索引列 -->
                      <el-table-column type="index"></el-table-column>
                      <el-table-column label="属性名称" prop="attr_name"></el-table-column>
                      <el-table-column label="操作">
                          <template slot-scope="scope">
                              <el-button type="primary" size="mini"
                               icon="el-icon-edit" @click="showEditDialog(scope.row.attr_id)">编辑</el-button>
                              <el-button type="danger" size="mini" icon="el-icon-dalete" @click="removeParams(scope.row.attr_id)">删除</el-button>
                          </template>
                      </el-table-column>

                  </el-table>
              </el-tab-pane>
            </el-tabs>
        </el-card>
        <!-- 添加参数对话框 -->
        <el-dialog
        :title="'添加'+ titleText"
        :visible.sync="addDialogVisible"
        width="50%" @close="addDialogClosed">
        <!-- 添加参数对话框 -->
        <el-form :model="addForm" :rules="addFormRules"
         ref="addFormRef" label-width="100px"  >
        <el-form-item :label="titleText" prop="attr_name">
        <el-input v-model="addForm.attr_name"></el-input>
        </el-form-item>
        </el-form>
        <span slot="footer" class="dialog-footer">
          <el-button @click="addDialogVisible = false">取 消</el-button>
          <el-button type="primary" @click="addParams">确 定</el-button>
        </span>
        </el-dialog>
        <!-- 修改参数对话框 -->
         <el-dialog
        :title="'修改'+ titleText"
        :visible.sync="editDialogVisible"
        width="50%" @close="addDialogClosed">
        <!-- 添加参数对话框 -->
        <el-form :model="editForm" :rules="editFormRules"
         ref="editFormRef" label-width="100px"  >
        <el-form-item :label="titleText" prop="attr_name">
        <el-input v-model="editForm.attr_name"></el-input>
        </el-form-item>
        </el-form>
        <span slot="footer" class="dialog-footer">
          <el-button @click="editDialogVisible = false">取 消</el-button>
          <el-button type="primary" @click="editParams">确 定</el-button>
        </span>
        </el-dialog>
    </div>
</template>


<script>
export default {
    data(){
        return{
            cateList:[],
            cateProps:{
                value:'cat_id',
                label:'cat_name',
                children:'children'
            },
            selectcatekeys:[],
            activeName:'many',
            manyTableData:[],
            onlyTableData:[],
            addDialogVisible: false,
            addForm:{
                attr_name:''
            },
            addFormRules:{
                attr_name:[
                     {required : true, message:'请输入参数名称',trigger:'blur'}
                ]
               
            },
            editDialogVisible:false,
            // 修改的表单数据对象
            editForm:{},
            editFormRules:{
                attr_name:[
                     {required : true, message:'请输入参数名称',trigger:'blur'}
                ]
            },
            // 控制按钮与文本框的切换显示
            inputVisible:false,
            //输入文本内容
            inputValue:''
           
        }
    },
    created(){
        this.getCateList()
    },
    methods:{
     async getCateList(){
         const {data: res} = await this.$http.get('categories')

         
        if(res.meta.status !==200){
             return this.$message.error('获取商品分类失败')
        }
        this.cateList = res.data

        console.log(this.cateList)

     },
     //级联选择框变化函数
     handleChange(){ 
         this.getParamsDate()
     },
     handleTabClick(){
      this.getParamsDate()
     },
     async getParamsDate(){
          if(this.selectcatekeys.length !==3){
           this.selectcatekeys=[]
           this.manyTableData = []
           this.onlyTableData =[]
           return
         }
         console.log(this.selectcatekeys)
         //根据所选ID 和当前面板获取对应参数
         const {data:res}=await this.$http.get(`categories/${this.cateId}/attributes`,
         {params:{sel: this.activeName}})

         if(res.meta.status !==200){
             return this.$message.error('参数获取失败')
         }
         //console.log(res.data)
         res.data.forEach(item =>{
             item.attr_vals = item.attr_vals!='' ? item.attr_vals.split(',') : []
            //  控制文本框的显示与隐藏
            item.inputVisible = false
            item.inputValue = ''
         })
         if(this.activeName ==='many'){
             this.manyTableData = res.data
         }else{
             this.onlyTableData = res.data
         }
     },
     addDialogClosed(){
         this.$refs.addFormRef.resetFields()
     },
     addParams(){
         this.$refs.addFormRef.validate(async valid => {
             if(!valid) return
             const {data:res} = await 
             this.$http.post(`categories/${this.cateId}/attributes`,
             {attr_name: this.addForm.attr_name,
              attr_sel: this.activeName})

              if(res.meta.status !==201){
                  return this.$message.error('添加参数失败！')
              }
              this.$message.success('添加参数成功！')
              this.addDialogVisible = false
              this.getParamsDate()

         })
     },
    // 展示修改的对话框
    async showEditDialog(attr_id){
        const {data:res}= await this.$http.get
        (`categories/${this.cateId}/attributes/${attr_id}`
        , {params:{attr_sel: this.activeName }})

        if(res.meta.status !== 200){
            return this.$message.error("获取参数失败")
        }

        this.editForm = res.data
        this.editDialogVisible = true

    },
    // 重置修改的表单
    addDialogClosed(){
        this.$refs.editFormRef.resetFields()
        },
    editParams(){
        this.$refs.editFormRef.validate(async valid =>
        {
            if(!valid) return
            const {data:res}= await this.$http.put(`categories/${this.cateId}/attributes/${this.editForm.attr_id}`,
            { attr_name:
              this.editForm.attr_name, attr_sel:this.activeName

            })
            if(res.meta.status !== 200){
                return this.$message.error('编辑失败')
            }
            this.$message.success('修改参数成功')
            this.getParamsDate()
            this.editDialogVisible = false

        })
    },
    async removeParams(attr_id){
        //根据ID删除对应的参数项
        const confirmReult= await this.$confirm('此操作将永久删除参数, 是否继续?', '提示', {
          confirmButtonText: '确定',
          cancelButtonText: '取消',
          type: 'warning'
        }).catch(err => err)

        if(confirmReult !== 'confirm'){
            return this.$message.info('已经取消删除')
        }

        const {data:res}= await this.$http.
        delete(`categories/${this.cateId}/attributes/${attr_id}}`)

        if(res.meta.status !==200){
            return this.$message.error('删除参数失败')
        }
        this.$message.success('删除参数成功')
        this.getParamsDate()
    },
    async handleInputConfirm(row){
        if(row.inputValue.trim().length===0){
            row.inputValue = ''
            row.inputVisible = false
            return
        }
        //输入了文字 处理
        //row.inputVisible = false
        row.attr_vals.push(row.inputValue.trim())
        row.inputValue = ''
        row.inputVisible = false

        //发送到数据库
        this.saveAttrVals(row)

    },
    //点击按钮，输入框出现
    showInput(row){
        row.inputVisible = true

        //this.inputVisible = true;
          this.$nextTick(_ => {
          this.$refs.saveTagInput.$refs.input.focus();
        });
                
    },
    async saveAttrVals(row){
         const {data:res }= await this.$http.put(`categories/${this.cateId}/attributes/${row.attr_id}`,
        {attr_name: row.attr_name,
        attr_sel: row.attr_sel,
        attr_vals: row.attr_vals.join(',')
        })

        if(res.meta.status !== 200){
            return this.$message.error('修改参数失败')
        }
        this.$message.success('修改参数成功')

    },
    //删除对应的参数可选项
    handleClose(i,row){
        row.attr_vals.splice(i,1)
        this.saveAttrVals(row)
    }
    },
    computed:{
        // 需要禁用but return true
        isBtnDisabled(){
            if(this.selectcatekeys.length !==3){
                return true
            }
            return false

        },
        cateId(){
            if(this.selectcatekeys.length ===3){
                return this.selectcatekeys[2]
            }
            return null
        },
        titleText(){
            if(this.activeName ==='many'){
            return '动态参数'}

            return '静态属性'
        }
       
    }
    
}
</script>

<style  lang="less" scoped>
.cat_opt{
    margin: 15px 0;
}
.el-tag{
    margin: 10px;
}
.input-new-tag{
    width:120px;
}
</style>